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Chemical Engineering - Mechanical Operations

Exercise : Mechanical Operations - Section 4
36.
Ore concentration by jigging is based on the difference in the __________ of the particles.
specific gravities
wettability
shape
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
Size measurement of ultrafine particles can be best expressed in terms of
centimetre
screen size
micron
surface area per unit mass
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Reduction ratio of crushers is the
ratio of feed opening to discharge opening.
ratio of discharge opening to feed opening.
determining factor for minimum dia of the feed and the product.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
Which is a secondary crusher for a hard & tough stone ?
Jaw crusher
Cone crusher
Impact crusher
Toothed roll crusher
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
Which of the following equations is Rittinger's crushing law ? (where P = power required by the machine, m = feed rate, k = a constant = volume surface mean diameter of feed & product respectively.)
P/m = K/Dp
P/m = K . ln
P/m = K .
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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